I was born and raised as Gentile; after my Fathers death I am now questioning the teachings I received about life after death. I am very eager to learn the foundational teachings of Judaism. Can someone recomend a starting point?
Welcome to Mi Yodeya!
I recommend that you start by looking at JewFAQ, which covers basic ideas of Judaism in a well-organized way, and includes articles that are written specifically for beginners as well as articles that are more in-depth. They also include helpful to other resources for further reading. Here is their article on the afterlife.
If you have questions about what you're reading, you are welcome to post them here.